sc3-plugins

Place the downloaded SC3plugins folder in your Extensions folder. On Mac OS X, this resolves to:

~/Library/Application Support/SuperCollider/Extensions

You may need to create the Extensions folder if it does not already exist.

On other platforms, you can find where this is by running the following line of code in SuperCollider:

(
// post the directory in which to move the SC3Plugins folder
Platform.userExtensionDir.postln;
)
(
// alternatively, SC can open it for you
// (assuming it already exists! - you may need to create /Extensions)
Platform.userExtensionDir.openOS;
)

Kernels, Matrices & Recordings

Additionally, the SuperCollider3 version of the ATK has a number of dependencies: